Intelligent Speed Adaptation in vehicles

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Intelligent Speed Adaptation in vehicles
Review - 0

• Date 01/08/09
• Tamil Eniyan. M
• 08MEA026
• M.Tech-Automotive Electronics

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Contents

• Introduction
• Existing speed adaptation techniques
• Need
• System Overview
• Block diagram
• Steps
• Time plan
• Software tools
• Hardware modules
• Conclusion

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Introduction

• The Intelligent Speed Adaptation is done in
  vehicle using GPS technology by tracking the
  location of the vehicle
• This system does not require a preloaded map or
  route for its operation
• This system is a low cost and effective system
  which requires less memory and simple algorithm.

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Existing speed adaptation techniques

• RF id based systems
• This system uses RF id tags on the sign boards,
  the receiver module in the vehicle receives the
  signal at various speed zones through these RF
  tags.
• This systems can be employed only for slow
  vehicles. Practically it cannot be employed in
  the highway for vehicles with high speed like
  100kmph
• Optical recognition systems
• This is done by camera based detection, the
  camera records continuously, when a sign boar is
  approached, the sign is recognized by image
  processing techniques.
• This system uses complex algorithm
• Uses much resources
• Some critical cases when the sign board is
  covered by tree branches, the system does not
  detect the sign board.

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Existing speed adaptation techniques

• GPS based systems
• The GPS receiver module tracks its position and
  using the pre loaded map and speed zone database,
  the speed adaptation is done
• Requires a large memory to store the complete map
  and speed zone databases.
• Emergency sign boards like MEN AT WORK, TAKE
  DIVERSION etc. are not fed to the receiver
  dynamically.
• Dead reckoning
• Using sensors, it can plot the path taken by the
  vehicle. By overlaying this path onto a digital
  map, the DR system knows approximately where the
  vehicle is, what the local speed limit etc.
• This system is much complicated with multiple
  sensors and possibility of deviation from actual
  data is high

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Need for a new system

• To over come the limitations of the other Speed
  adaptation systems.
• To reduce the memory requirement of conventional
  GPS speed adaptation techniques.
• To reduce the system cost and enhance the system
  performance to provide dynamic update of
  information.

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Block Diagram
lat12.970649 lon79.159310
Speed controller
4
3
GPS Receiver
Controller
My position?
2
Memory
RF Receiver
1
RF Tx
Display Alert
TOLLGATE
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Step 1 Transmitter sends a data to the
vehicle. The data is a table of information of
latitude and longitude and its corresponding road
sign, speed limit..
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Step 2 GPS receiver requests its position data to
satellite.
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Step 3 GPS receiver receives its position data
from satellite.
lat12.970649 long79.159310
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lat12.970649 long79.159310
000176.1100412.19256
?
A sample data from received data.
Current Position From GPS
YES
Step 4 The current position is compared with the
data of table received. When the current position
reaches the position of data, corresponding alert
is done.
Check for the corresponding sign speed limit
Alert the driver / Limit speed
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Time plan
August Literature survey
September Selection of components/ Study about components selected (microcontroller, GPS, Speed control)
October Selection of components/ Study about components selected (microcontroller, GPS, Speed control)
November Basic hardware design
December Full Hardware Implementation (Speed Zone Detection Alert)
January Programming
February Stage II development (speed control implementation)
March Project Completion
April Report Preparation
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Software Tools

• Microcontroller Programming tools
• Keil IDE
• MPLAB IDE
• Flashing tool

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Hardware modules

• GPS Receiver
• Microcontrollers
• Wireless Transmitter / Receiver
• Computer Interface
• Display unit
• Speed Control Module

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Reference

• N. Agerholm,R, Waagepetersen,N. Tradisauskas,and
  H. Lahrmann 2008 - IEEE Intelligent Vehicles
  Symposium Intelligent Speed Adaptation in
  Company Vehicles
• Riaz Sayed, Pierre Delaigue, Jeremy Blum, Ali
  Mortazavi and
• Azim Eskandarian 2007-01-1321 SAE TECHNICAL
  PAPER SERIES
• Development of an Intelligent Multimode Speed
  Adaptation System
• European Road Safety Observatory
• Intelligent Speed Adaptation (ISA)
  http//www.erso.eu/knowledge/content/04_esave/
• University of Leeds and MIRA Ltd.
• Intelligent Speed Adaptation Literature Review
  and scoping study- January 2006
  http//www.tfl.gov.uk/assets/

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Thank you
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